#[cfg(target_arch = "x86_64")]
use std::arch::x86_64::*;

pub struct SimdOptimizer;

impl SimdOptimizer {
    #[cfg(target_arch = "x86_64")]
    pub fn vector_add_simd(a: &[f32], b: &[f32]) -> Result<Vec<f32>, Box<dyn std::error::Error>> {
        if a.len() != b.len() {
            return Err("Vector dimensions don't match for addition".into());
        }
        
        if !is_x86_feature_detected!("avx2") {
            return Err("AVX2 not supported on this CPU".into());
        }
        
        let mut result = vec![0.0; a.len()];
        
        unsafe {
            let chunks = a.len() / 8;
            
            for i in 0..chunks {
                let a_chunk = _mm256_loadu_ps(&a[i * 8]);
                let b_chunk = _mm256_loadu_ps(&b[i * 8]);
                let sum = _mm256_add_ps(a_chunk, b_chunk);
                _mm256_storeu_ps(&mut result[i * 8], sum);
            }
            
            // 处理剩余的元素
            for i in (chunks * 8)..a.len() {
                result[i] = a[i] + b[i];
            }
        }
        
        Ok(result)
    }
    
    #[cfg(not(target_arch = "x86_64"))]
    pub fn vector_add_simd(a: &[f32], b: &[f32]) -> Result<Vec<f32>, Box<dyn std::error::Error>> {
        Err("SIMD optimization only available on x86_64".into())
    }
}